package Demo2;

class Student {

}
class Teacher {

}
class School {
    //学校由学生和老师组成
    public Student[] students;
    public Teacher[] teachers;
    public School() {
        this.students = new Student[10];//10个学生
        this.teachers = new Teacher[5];//5个老师
    }
}
public class TestDemo1 {
//    protected int a = 10;
}
